Vostok 1 and greenhouse: what they have in common

1. Step 1. Vostok 1 — has part — Heat shield. A spherical descent capsule with a heat shield.
2. Step 2. Heat shield — uses — Heat transfer. It protects by carrying heat away with a vaporizing layer.
3. Step 3. Heat transfer — is used in — Solar water heater. Heating the water.
4. Step 4. Solar water heater — has part — Window glass. The glass on top creates a greenhouse effect.
5. Step 5. Window glass — is part of — Greenhouse. It lets light in and holds heat.

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